Those who can, do; . . .

Posted by R. Berg on January 02, 2002

In Reply to: Origin of a phrase posted by Jack Wilkinson on January 02, 2002

: Source (?); "those who can, do: those who can't, teach". While the meaning is obvious, where did it come from? Any help?

It's attributed to George Bernard Shaw. I don't know the details or even whether that attribution is correct. Anybody else?